Harrow



(No Model.)

W. E. PHILLIPS. HARROW.

Nd. 605,651. Patented June 14, 1898.

- this specification.

UN TED STATES wILLIsE. PHILLIPS, or SAGUACHE, COLORADO.

PATENT OFFICE.

HARROW.

SPECIFICATION forming part of Letters Patent No. 605,651, dated June 14, 1898. Application filed April 3,1896. Serial No. 586,054. (No model.)

To all whom it may concern.-

Be it known that I, WILLIS E. PHILLIPS, a citizenof the United States, residing at Saguache, in the county of Saguache and State of Colorado, have invented certain new and useful Improvements in I-Iarrows; and I do declare the following to be a full, clear, and exact" description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of This invention relates particularly to the novel construction of a rotatable tooth for harrows, its object being to provide a tooth" of this class which will be cheapof construction, durable,'and highly efficient, and will cause comparativelylittle resistance to the draft.

The invention consists of a harrow-tooth having an arbor jou'rnaled obliquely in the harrow-frame and having its lower end split.

The form of the frame is entirely immaterial, and for the purposes of this application I have shown an ordinary V-shaped frame A. The teeth B may be as numerous as it is necessary to place them in order that the entire surface of the ground shall be acted upon. The upper end'of the tooth is in the form of an arbor G and projects obliquely through the harrow-frame, a bushing a being preferably fitted within the aperture withinwhich the arbor is journaled and a nut c or'analogous device being applied to the upper end of the arbor to prevent the tooth from dropping out when-the harrow-frame israised. The lower end of the tooth is divided into several prongs, as shown, four in number, and indirelation to the axis of the tooth. The teeth are so set within the frame that their axes are inclinedinwardly from its body, so that the prong, as 1, which is directed outwardly approaches more nearly to a vertical position than any of the others,and consequently penetrates the soil deeper. The prong, as 3, which projects inwardly with reference to the body of the harrow approaches more nearly to the horizontal than any of the others, and consequently penetrates the soil but slightly, if at all. The act-ion of each tooth, therefore, is rotative as the harrow is advanced, the resistance of the outer tooth,as 1-,bein g much greater than any of the others. The rotation being away from the body of the harrow, the forwardly-projecting prong enters the soil and as it is carried around is forced downwardly at a constantly-changing angle and with a boring or twisting action. As each prong passes the position at which itis most deeply inserted into the soil it is elevated with the same boring or twisting action and raises the soil with it. In using this form of harrowframe an equal number of teeth are placed upon each side of the frame, so as to avoid side draft.

I am aware that harrows have been made which 7 have comprised gangs of teeth arranged in circular alinement in disks pivoted in the harroW-frame, the teeth being perpendicular to the plane of the disk. I am also aware that in some instances the arbor of each disk has been set obliquely. I believe I am the first, however, to form a tooth with ,prongs branching obliquely from its axis, and by this construction I secure a very difierent action from that obtained by the older constructions referred to, the result being a much more thorough agitation of the soil at the expenditure of much less power.

I claim as my invention- 1. In a harrow, the combination with a frame,

frame overlap, the several teeth being inspreading from its axis, each of the prongs 1o elined inwardly toward the median line of the being straight. frame, each toothhaving a plurality of prongs In testimony whereof I affix my signature spreading from its axis, each of the prongs in presence of two witnesses. being strai ht. i

2. I11 LllilFLOW,tllOCOlllblIlZLtiOll withaframe, 1 HILLH of a plurality of rotatable teeth having their \Vitnesses: axes laterally oblique as to the frame, each J. N. COLEMAN, tooth having" a plurality of pointed prongs V. O. LOCKETT. 

